5 Simple Statements About a-BBO Crystal Explained
5 Simple Statements About a-BBO Crystal Explained
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The length from the SHG crystal significantly influences the spectral width of your reference pulse, or alternatively the bandwidth of the SHG filter.
As a way to use the required CW injury threshold of an optic, it is necessary to learn the next:
In conclusion, BBO crystals are an interesting and adaptable substance which includes significantly Highly developed the sphere of optics and photonics. By knowledge their Attributes and the way to tackle them, we can continue on to harness their opportunity and drive more enhancements in optical technology.
Any contamination can degrade the optical general performance on the crystal and likely trigger damage less than substantial laser electricity. When storing BBO crystals, they should be put in a very protective scenario to stop Bodily problems and mud accumulation.
As the 2nd harmonic light propagates, its Electricity flows in another course than that of the elemental mild.
Humidity can result in water absorption about the crystal floor, which may degrade its optical efficiency. The standard of the incident gentle, like its wavelength, intensity, and polarization, may also impact the performance of BBO crystals in many apps.
When an optic is damaged by a continual wave (CW) laser, it is usually because of the melting of your surface because of absorbing the laser's Strength or harm to the optical coating (antireflection) [1]. Pulsed lasers with pulse lengths extended than 1 µs could be treated as CW lasers for LIDT discussions.
But BBO crystals stand resilient, making certain that techniques proceed to operate with out hiccups, minimizing downtimes and guaranteeing Price-success Eventually.
With good treatment and handling, BBO crystals can past for many years. Having said that, their lifespan may be shortened by things including high temperature, humidity, and Bodily damage. BBO crystals are sturdy and sturdy, but Like every optical ingredient, they are able to degrade after a while Otherwise adequately cared for.
This calculation assumes a uniform beam depth profile. You must now alter this Electricity density to account for hotspots or other nonuniform intensity profiles and approximately estimate a maximum Vitality density. For reference a Gaussian beam commonly has a maximum Power density that is certainly 2 times that from the 1/e2 beam.
When choosing an SHG crystal, the pulse period of your laser supply need to be taken into consideration. A mismatch concerning the period and crystal thickness will bring about SHG pulses for a longer time in time and narrower in spectral information than possible less than ideal situations.
When laser gentle is focused into a spot, the diameter with the beam midsection will be the focal spot size, and the rate at which the light diverges in the beam waist is associated with the Rayleigh selection (zR).
Technology of deep ultraviolet radiation at 210 nm by Kind-I 3rd harmonic technology is realized in a check here very set of BBO crystals with conversion performance as substantial as 36%.